<!DOCTYPE html>
<html lang="en">
    <head>
        <title></title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <link  rel="stylesheet">
        <script src="js/chp13-event.js"></script>
    </head>
    <body >
        <div id='panel' style="background-color:red;height:100px;width:100px;" >
            <button id="myBtn">点击我吧</button>
        </div>
        <div style="background-color:blue;height:100px;width:100px;">
            绿色区域
        </div>
        <textarea name="" id="myTxt" cols="30" rows="10"></textarea>
    </body>
    
</html>